Ceiling-rosette for incandescent lamps



(No Model.)

J. GARTWRIGHT. GEILING ROSETTB FOR INUANDBSOENT LAMPS.

No. 450,991. Patented Apr. 21, 1891.

NITED STATES ATENT OFFICE.

DAVID J. OARTXVRIGHT, OF BOSTON, ASSIGNOR TO JOHN S. POTTER, OF

NEVTON, MASSACHUSETTS.

CEILING-ROSETTE FOR INCANDESCENT LAMPS.

SPECIFICATION forming part of Letters Patent No. 450,991, dated April21, 1891.

Application filed November 10, 1890. Serial No. 370,944. (No model.)

To to whom it may concern.-

l 3e it known that I, DAVID J. OARTWRIGHT, a citizen of the UnitedStates, and a resident of Boston, in the county of Sulfolk and State ofMassachusetts, have invented new and useful Improvements inCeiling-Rosettes for Incandescent Lamps, of which the following, takenin connection with the accompanying drawings, is a specification.

This invention relates to improvements in ceiling-rosettes forconnecting the lamp-wires of incandescent electric lamps to the circuitwires in a detachable manner, so that said circuit-wires may readily beattached to the lamp-wires in case of a renewal of the latter, as willhereinafter be more fully shown and described, reference being had tothe accompanying drawings, in which Figure 1 represents a top plan viewof the improved ceiling-rosette. Fig. 2 represents a bottom plan view ofthe same; and Fig. 3 represents a central longitudinal section on theline X X shown in Fig. 1.

Similar letters refer to similar parts wherever they occur on thedifferent parts of the drawings.

A in Fig. 3 represents the ceiling to which the improved rosette is tobe attached, and B B represent the parallel circuit-wires leading fromthe dynamo, as usual.

To the ceiling I secure my improved rosette, which consists of a block0, preferably made of porcelain or equivalent non-cond uctingmaterial,said block being made in a single piece,

and having on its upper side an annular lip or ring 0, as shown in thedrawings, the upper side of which is held against the under side of theceiling A, preferably by means of fastening-screws goingthroughperforations D D in the block O, as shown in Figs. 1 and 2. The annularlip or ring O has a pair of diametrically-arranged cut-away portions 00, adapted to receive the radial metal arms E E, which are secured in adetachable manner to the block 0, preferably by means of screws 6 e,passing loosely through perforations in the block O, and having theirupper ends screwthreaded and screwed through threaded perforations insaid radial metal arms E E, as shown in the drawings. The inner ends ofthe said radial metal arms E E are provided with binder-screws E E, bymeans of which the upper ends of the lamp-wires F F are metallicallyconnected to said radial arms E E.

O is a central vertical perforation in the block 0, through which arepassed the silkspun or coated lamp-wires F F, as shown in the drawings.The radial arms E E have their outer portions projecting outside of theblock O, and are provided with binder-screws E E, by means of which saidradial arms are metallically connected to the respective circuit-wires BB, as shown in the drawings. If so desired, a fuse may be interposedbetween each of the binder-screws E and its corresponding lamp-wire, forthe purpose of preventing the latter from being blown in case anexcessive or abnormal current should be conducted to the metallic armsof the rosette, without departing from the essence of my invention. Assuch fuse or fusible wire is well known in the art to which thisinvention relates, it is not represented in the drawings.

By the use of my device the lam p-wires may easily be renewed at anytime simply by detaching the block C from the ceiling and circuit-wires,after which the lamp-wire may be renewed by detaching the old wires fromthe binder-screws E E ,and replacing them with new ones to be attachedto said binder-screws, after which the rosette is secured to the ceilingand its arms E E connected to the circuitwires B B, as before.

Having thus fully described the nature, construction, and operation ofmy invention, I wish to secure by Letters Patent and claim- Theherein-described ceiling-rosette for incandescent lamps, consisting of ablock of insulating material having an annular ring or lip on its upperside, combined with a pair of radial metal arms secured to said blockand projecting through cut-away portions in the annular lip, said armshaving their inner and outer ends provided with binder-screws forsecuring them to the respective lamp and circuit wires, substantially asand for the purpose set forth.

In testimony whereof I have signed my name to this specification, in thepresence of two subscribing witnesses, on this 1st day of November, A.D. 1890.

DAVID J. CARTWRIGH'J.

\Vitnesses:

ALBAN ANnRE'N, JOSEPH F. HAWKINS.

